diff --git a/include/openmc/volume_calc.h b/include/openmc/volume_calc.h
index ff75b2b8bc..2773a39fa6 100644
--- a/include/openmc/volume_calc.h
+++ b/include/openmc/volume_calc.h
@@ -35,7 +35,7 @@ public:
   // Constructors
   VolumeCalculation(pugi::xml_node node);
 
-  VolumeCalculation() {}
+  VolumeCalculation() = default;
 
   // Methods